Uses of Interface
org.apache.hadoop.mapred.Mapper
Packages that use Mapper
Package
Description
-
Uses of Mapper in org.apache.hadoop.mapred
Methods in org.apache.hadoop.mapred that return MapperMethods in org.apache.hadoop.mapred that return types with arguments of type MapperMethod parameters in org.apache.hadoop.mapred with type arguments of type MapperModifier and TypeMethodDescriptionvoidJobConf.setMapperClass(Class<? extends Mapper> theClass) Set theMapperclass for the job. -
Uses of Mapper in org.apache.hadoop.mapred.lib
Classes in org.apache.hadoop.mapred.lib that implement MapperModifier and TypeClassDescriptionclassThe ChainMapper class allows to use multiple Mapper classes within a single Map task.classThis class implements a mapper/reducer class that can be used to perform field selections in a manner similar to unix cut.classIdentityMapper<K,V> Implements the identity function, mapping inputs directly to outputs.classInverseMapper<K,V> AMapperthat swaps keys and values.classRegexMapper<K>AMapperthat extracts text matching a regular expression.classAMapperthat maps text values into <token,freq> pairs.Method parameters in org.apache.hadoop.mapred.lib with type arguments of type MapperModifier and TypeMethodDescriptionstatic <K1,V1, K2, V2>
voidChainMapper.addMapper(JobConf job, Class<? extends Mapper<K1, V1, K2, V2>> klass, Class<? extends K1> inputKeyClass, Class<? extends V1> inputValueClass, Class<? extends K2> outputKeyClass, Class<? extends V2> outputValueClass, boolean byValue, JobConf mapperConf) Adds a Mapper class to the chain job's JobConf.static <K1,V1, K2, V2>
voidChainReducer.addMapper(JobConf job, Class<? extends Mapper<K1, V1, K2, V2>> klass, Class<? extends K1> inputKeyClass, Class<? extends V1> inputValueClass, Class<? extends K2> outputKeyClass, Class<? extends V2> outputValueClass, boolean byValue, JobConf mapperConf) Adds a Mapper class to the chain job's JobConf. -
Uses of Mapper in org.apache.hadoop.mapred.lib.aggregate
Classes in org.apache.hadoop.mapred.lib.aggregate that implement MapperModifier and TypeClassDescriptionclassValueAggregatorCombiner<K1 extends WritableComparable,V1 extends Writable> This class implements the generic combiner of Aggregate.classValueAggregatorJobBase<K1 extends WritableComparable,V1 extends Writable> This abstract class implements some common functionalities of the the generic mapper, reducer and combiner classes of Aggregate.classValueAggregatorMapper<K1 extends WritableComparable,V1 extends Writable> This class implements the generic mapper of Aggregate.classValueAggregatorReducer<K1 extends WritableComparable,V1 extends Writable> This class implements the generic reducer of Aggregate.